From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.3 required=5.0 tests=MAILING_LIST_MULTI,
	RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham
	autolearn_force=no version=3.4.4
Received: (qmail 7014 invoked from network); 14 Aug 2020 22:02:22 -0000
Received: from mother.openwall.net (195.42.179.200)
  by inbox.vuxu.org with ESMTPUTF8; 14 Aug 2020 22:02:22 -0000
Received: (qmail 19463 invoked by uid 550); 14 Aug 2020 22:02:17 -0000
Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm
Precedence: bulk
List-Post: <mailto:musl@lists.openwall.com>
List-Help: <mailto:musl-help@lists.openwall.com>
List-Unsubscribe: <mailto:musl-unsubscribe@lists.openwall.com>
List-Subscribe: <mailto:musl-subscribe@lists.openwall.com>
List-ID: <musl.lists.openwall.com>
Reply-To: musl@lists.openwall.com
Received: (qmail 18421 invoked from network); 14 Aug 2020 22:02:17 -0000
From: Florian Weimer <fw@deneb.enyo.de>
To: Rich Felker <dalias@libc.org>
Cc: musl@lists.openwall.com
References: <20200814214136.GP3265@brightrain.aerifal.cx>
Date: Sat, 15 Aug 2020 00:02:01 +0200
In-Reply-To: <20200814214136.GP3265@brightrain.aerifal.cx> (Rich Felker's
	message of "Fri, 14 Aug 2020 17:41:38 -0400")
Message-ID: <871rk8opie.fsf@mid.deneb.enyo.de>
MIME-Version: 1.0
Content-Type: text/plain
Subject: Re: [musl] Restrictions on child context after multithreaded fork

* Rich Felker:

> In case we do want to follow a direction of trying to provide some
> degree of relaxation of restrictions on the child (taking the liberty
> of POSIX-future drop of fork's AS-safety requirement), I did a quick
> survey of libc-internal locks, and found:

pthread_once is another source of problems, although there seem to be
few users in musl.